CN201184393Y - Improved Structure of Power Transmission Mechanism - Google Patents

Abstract

The utility model relates to a power transmission mechanism's improvement structure, include: the driving device comprises a motor with a transmission shaft, a first transmission piece pivoted with the transmission shaft of the motor, and a second transmission piece meshed with the first transmission piece and provided with a driving shaft; the first transmission piece and the second transmission piece are gears which are meshed with each other, and the gears comprise: the gear bevel angle of the first transmission member and the gear bevel angle of the second transmission member are inverted with respect to each other, and the first transmission member and the second transmission member are completely engaged with each other by the inverted bevel angles. The utility model discloses a back clearance between the tooth can be eliminated in operation process to power transmission mechanism's improvement structure for intermeshing's conjugate rotor meshes completely, and can smooth-going no back clearance with the synchronous transmission of power, just, it is little, simple structure to receive the machining precision influence.

Description

Improved Structure of Power Transmission Mechanism

technical field

The utility model relates to a power transmission mechanism, in particular to a mechanism which can eliminate the backlash between teeth during the running process, so that the conjugate rotors meshing with each other can be completely meshed, so that the power can be transmitted synchronously.

Background technique

As we all know, the generation of power is mainly achieved by the output of the power source, and the specific mechanism component can be made to perform a preset operation through the pivotal connection between the transmission shaft of the power source and the specific mechanism component. For example: the pivotal connection between the power source and the fan provides air supply, the pivotal connection between the power source and the gear serves as the driving shaft for power transmission, the pivotal connection between the power source and the roller provides rolling, the pivotal connection between the power source and the pump provides the power for intake and exhaust, The power source is pivotally connected with a specific appliance to provide rotating power, power source and gearbox, etc.

The conjugate rotor pivotally connected with the power source in the present invention is a setting of a spur gear set, which has excellent performance in power transmission. However, the spur gear sets that rotate relative to each other during actual operation will produce a backlash between the teeth when switching between forward rotation and reverse rotation, so that the two gears cannot be completely meshed. Moreover, the tooth surfaces of the two gears are constantly worn, and the greater the backlash between the teeth is, the greater the incomplete meshing will be caused, and the power transmission will be unstable and the efficiency will be reduced.

Contents of the invention

The purpose of this utility model is to provide an improved structure of the power transmission mechanism. The conjugate rotors meshing with each other can eliminate the backlash between the teeth during the operation process, so that the conjugate rotors meshing with each other are completely meshed, and can be smooth without backlash. The gap transmits the power synchronously.

Another object of the present invention is to provide an improved structure of the power transmission mechanism, in which the switching between forward rotation and reverse rotation does not produce backlash between teeth, so that the two conjugate rotors meshing with each other can run stably.

Another purpose of the present invention is to provide an improved structure of the power transmission mechanism, which is less affected by machining accuracy, has a simple structure and can reduce manufacturing costs.

In order to achieve the above object, the improved structure of the power transmission mechanism of the present utility model includes: a power source with a transmission shaft, and a first transmission member pivotally connected with the transmission shaft of the power source, and a driving mechanism that is engaged with the first transmission member. The second transmission part of the shaft is characterized in that: the first transmission part and the second transmission part are gears meshing with each other, and the gear comprises: a properly defined spur gear tooth profile curve, supplemented by a defined bevel angle, The first tooth profile curve and the second tooth profile curve generated, and the gear bevel angle of the first transmission member and the gear bevel angle of the second transmission member are mutually inverted, and the mutually inverted bevel The angle is such that the first transmission member is fully engaged with the second transmission member.

Another feature of the improved structure of the power transmission mechanism of the present invention is that: the first transmission part and the second two transmission parts are respectively provided with a resisting mechanism, and the resisting mechanism includes an elastic part and a fixing part, which can be applied to the first and second transmission parts respectively. An axial force between the transmission member and the second transmission member keeps the first transmission member and the second transmission member in a completely meshed state.

Beneficial effects of the utility model: by virtue of the mutually inverted oblique cone angles and the setting of the resisting mechanism, not only the backlash between the teeth can be eliminated during the operation process, but the conjugate rotors meshing with each other can be completely meshed, and the power can be smoothly and without backlash. The transmission is synchronous, and the switching between forward rotation and reverse rotation of the first transmission member and the second transmission member does not produce backlash between the teeth, so that the two conjugate rotors meshing with each other can run stably. At the same time, because the utility model is less affected by the machining accuracy, the structure is simple and the manufacturing cost can be reduced.

For further elaborating the technical means and effects that the utility model takes to achieve the intended purpose, please refer to the following detailed description and accompanying drawings of the utility model. It is believed that the purpose, features and characteristics of the utility model should be able to be obtained in-depth and For specific understanding, however, the accompanying drawings are only for reference and description, and are not intended to limit the present utility model.

Description of drawings

The technical solutions and other beneficial effects of the utility model will be apparent through the detailed description of the specific implementation of the utility model in conjunction with the accompanying drawings.

In the attached picture,

Fig. 1 is the plane view of the improved structure of the utility model power transmission mechanism;

Fig. 2 is the plan view of the spur gear of the first transmission part of the improved structure of the utility model power transmission mechanism; and

Fig. 3 is the plan view of existing spur gear.

Detailed ways

In order to illustrate the technical means, structural features and the purpose and effect achieved by the utility model, the preferred embodiment of the utility model and accompanying drawings are described in detail as follows.

Fig. 1 shows the plan view of the improved structure of the power transmission mechanism of the present utility model, the improved structure 1 of the power transmission mechanism includes: a power source 2, a first transmission member 3, a second transmission member 4, and a drive shaft 5, and an abutment The forcing mechanism 6, wherein the power source 2 has a transmission shaft 20 for pivotally connecting the first transmission member 3. The first transmission member 3 is a gear, which is pivotally connected to the transmission shaft 20 of the power source 2. The gear includes: a properly defined spur gear tooth profile curve. In this embodiment, the thickness center of the gear is the spur gear profile curve 30, and Supplemented by defining the bevel angle t1, the first tooth profile curve 31 (for the upper tooth profile of the gear) and the second tooth profile curve 32 (for the lower tooth profile of the gear) generated by defining the bevel angle t1, the bevel angle t1 please Referring to Fig. 2 and comparing with Fig. 3, the tooth surface of each tooth of the existing spur gear 7 (referring to Fig. 3) does not have the setting of the oblique cone angle of the utility model, therefore, it does not have the same first tooth shape as the utility model A profile curve 31 and a second tooth profile curve 32 . In addition, it is worth mentioning that the first transmission member 3 and the second transmission member 4 can be made of materials with different hardness.

The utility model is provided with a resisting mechanism 6 between the first transmission part 3 and the transmission shaft 20, which can apply an axial force to the first transmission part 3. The resisting mechanism 6 includes an elastic part and a fixing part. The elastic part It is a compression reed 60, which is arranged between the first transmission member 3 and the transmission shaft 20, and the fixing member is a fixed thread 61 and a nut 62, wherein the fixed thread 61 is arranged on the transmission shaft 20 for the nut 62 locked. In this way, the pressure spring 60 can provide an axial force to the first transmission member 3 after assembly.

The second transmission member 4 meshes with the first transmission member 3, and the second transmission member 4 also has a gear with a first tooth profile curve 30 and a second tooth profile curve 31, which is in phase with the drive shaft 5 Pivot joints can be used to transmit power. However, it differs from the first transmission member 3 in that the bevel angle t1' (t1=t1') of the gear and the first transmission member 3 are mutually inverted, so, by the mutual inversion of the bevel angle t1, t1' (See FIG. 1 ) The two gears can be completely meshed (that is, the first transmission member 3 and the second transmission member 4 are completely meshed). In addition, the resisting mechanism 6 ′ is also provided between the second transmission member 4 and the drive shaft 5 to apply an axial force to the second transmission member 4 . The resisting mechanism 6 ′ also includes a compression spring 60 'The elastic part and the fixing thread 61' and the fixing part of the nut 62', wherein the pressure spring 60' is set between the second transmission part 4 and the drive shaft 5, and the fixing thread 61' is set on the drive shaft 5 on, for the nut 62' to be locked. In this way, the aforementioned compression springs 60, 60' can respectively apply an axial and opposite force to the first transmission member 3 and the second transmission member 4, so that the first transmission member 3 and the second transmission member 4 are kept mutually Fully meshed. In other words, the backlash between the tooth surfaces of the first transmission member 3 and the second transmission member 4 can be imparted to the first transmission member 3 and the second transmission member 4 by the pressure springs 60, 60' under continuous wear and tear. The axial force of the second transmission member 4 is absorbed, so that the first transmission member 3 and the second transmission member 4 are completely meshed with each other.

Therefore, the utility model not only can eliminate the backlash between the teeth during the operation process, but also can completely mesh the conjugate rotors that are meshing with each other by virtue of the mutually inverted inclined cone angles t1, t1' and the setting of the resisting mechanism 6, 6'. Smooth and no backlash to transmit power synchronously, and the switching between the forward rotation and reverse rotation of the first transmission member 3 and the second transmission member 4 will not produce backlash between teeth, which can make the two conjugate rotors meshing with each other run stably . At the same time, because the utility model is less affected by the machining accuracy, the structure is simple and the manufacturing cost can be reduced.

In summary, the improved structure of the power transmission mechanism of the present utility model has indeed met the requirements of a new patent, and a patent application has been filed according to law. The above descriptions are only preferred embodiments of the utility model, and all modifications and changes made according to the utility model shall belong to the protection scope of the claims of the utility model.

Claims (8)

1. An improved structure of a power transmission mechanism, comprising: Power source, with transmission shaft; the first transmission member is pivotally connected to the transmission shaft of the power source; and The second transmission member, meshed with the first transmission member, has a drive shaft; it is characterized in that: The first transmission member and the second transmission member are gears, and the gears include: a properly defined spur gear tooth profile curve, and a first tooth profile curve and a second tooth profile generated by defining a bevel angle In addition, the bevel angle of the gear of the first transmission member and the bevel angle of the gear of the second transmission member are opposite to each other, and the first transmission member and the second transmission member are completely meshed by the mutual inversion of the bevel angle. 2. The improved structure of the power transmission mechanism according to claim 1, characterized in that the defined position of the spur gear tooth profile curve can be taken as the center of the gear thickness. 3. The improved structure of the power transmission mechanism according to claim 2, characterized in that the spur gear tooth profile curve defined by the thickness center of the gear and the first tooth profile curve formed by matching the oblique bevel angle is the gear profile curve. The upper tooth profile, and the second tooth profile curve is the lower tooth profile of the gear. 4. The improved structure of the power transmission mechanism according to claim 1, characterized in that a resisting mechanism is further provided to impart an axial force to the first transmission member, and the resisting mechanism includes an elastic member and a fixing member . 5. The improved structure of the power transmission mechanism according to claim 4, characterized in that, the second transmission member is also provided with a resisting mechanism, which can apply an axial force to the second transmission member. 6. The improved structure of the power transmission mechanism according to claim 5, wherein the elastic member and the fixing member are respectively arranged between the first transmission member and the transmission shaft, and between the second transmission member and the drive shaft . 7. The improved structure of the power transmission mechanism according to claim 6, characterized in that the elastic member is a compression spring, which is respectively arranged between the first transmission member and the transmission shaft, and between the second transmission member and the drive shaft. Between, and this fixing member is fixed screw thread and nut, is respectively arranged on transmission shaft and drive shaft and is provided with fixed screw thread, for this nut locking. 8. The improved structure of the power transmission mechanism according to claim 1, wherein the first transmission member and the second transmission member are made of materials with different hardness.

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